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Diametral Strain Response and Microstructural Yielding Mechanisms of a Bainitic Pressure Vessel Steel
Unexpected trends of diametral strain range response have been recorded for annealed bainitic Cr-Mo-V-pressure vessel steel at room temperature and moderate strain amplitudes. Stress and diametral strain response were also recorded for three harder heat treatment variants, but they behaved as expect...
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Published in: | Journal of testing and evaluation 1988-01, Vol.16 (1), p.44-58 |
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creator | Rahka, KA Solin, JP Kemppainen, MJ |
description | Unexpected trends of diametral strain range response have been recorded for annealed bainitic Cr-Mo-V-pressure vessel steel at room temperature and moderate strain amplitudes. Stress and diametral strain response were also recorded for three harder heat treatment variants, but they behaved as expected. The alloy is strengthened by a carbide dispersion and a dislocation network, both of variable density. The unexpected diametral strain response is suggested to be associated with yet unknown macroscopic effects of particular observed microscopic mechanisms of slip. These mechanisms of slip can be analyzed with a model for dispersion strengthening which expresses the connection between nominal dislocation activity and the plastic and elastic components of elongation. The necessity for a differentiation between effective obstacles to slip consisting of stable carbides or cyclically unstable dislocation networks is arrived at. Observation of slip mechanisms by scanning electron microscopy is presented. |
doi_str_mv | 10.1520/JTE11051J |
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Stress and diametral strain response were also recorded for three harder heat treatment variants, but they behaved as expected. The alloy is strengthened by a carbide dispersion and a dislocation network, both of variable density. The unexpected diametral strain response is suggested to be associated with yet unknown macroscopic effects of particular observed microscopic mechanisms of slip. These mechanisms of slip can be analyzed with a model for dispersion strengthening which expresses the connection between nominal dislocation activity and the plastic and elastic components of elongation. The necessity for a differentiation between effective obstacles to slip consisting of stable carbides or cyclically unstable dislocation networks is arrived at. Observation of slip mechanisms by scanning electron microscopy is presented.</description><identifier>ISSN: 0090-3973</identifier><identifier>EISSN: 1945-7553</identifier><identifier>DOI: 10.1520/JTE11051J</identifier><identifier>CODEN: JTEVAB</identifier><language>eng</language><publisher>West Conshohocken, PA: American Society for Testing and Materials</publisher><subject>Applied sciences ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Elasticity. Plasticity ; Exact sciences and technology ; Materials science ; Mechanical and acoustical properties of condensed matter ; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology ; Metals, semimetals and alloys ; Metals. Metallurgy ; Physics ; Specific materials</subject><ispartof>Journal of testing and evaluation, 1988-01, Vol.16 (1), p.44-58</ispartof><rights>All rights reserved. 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Observation of slip mechanisms by scanning electron microscopy is presented.</description><subject>Applied sciences</subject><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Elasticity. Plasticity</subject><subject>Exact sciences and technology</subject><subject>Materials science</subject><subject>Mechanical and acoustical properties of condensed matter</subject><subject>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</subject><subject>Metals, semimetals and alloys</subject><subject>Metals. 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Metallurgy</topic><topic>Physics</topic><topic>Specific materials</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rahka, KA</creatorcontrib><creatorcontrib>Solin, JP</creatorcontrib><creatorcontrib>Kemppainen, MJ</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of testing and evaluation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rahka, KA</au><au>Solin, JP</au><au>Kemppainen, MJ</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Diametral Strain Response and Microstructural Yielding Mechanisms of a Bainitic Pressure Vessel Steel</atitle><jtitle>Journal of testing and evaluation</jtitle><date>1988-01-01</date><risdate>1988</risdate><volume>16</volume><issue>1</issue><spage>44</spage><epage>58</epage><pages>44-58</pages><issn>0090-3973</issn><eissn>1945-7553</eissn><coden>JTEVAB</coden><abstract>Unexpected trends of diametral strain range response have been recorded for annealed bainitic Cr-Mo-V-pressure vessel steel at room temperature and moderate strain amplitudes. Stress and diametral strain response were also recorded for three harder heat treatment variants, but they behaved as expected. The alloy is strengthened by a carbide dispersion and a dislocation network, both of variable density. The unexpected diametral strain response is suggested to be associated with yet unknown macroscopic effects of particular observed microscopic mechanisms of slip. These mechanisms of slip can be analyzed with a model for dispersion strengthening which expresses the connection between nominal dislocation activity and the plastic and elastic components of elongation. The necessity for a differentiation between effective obstacles to slip consisting of stable carbides or cyclically unstable dislocation networks is arrived at. Observation of slip mechanisms by scanning electron microscopy is presented.</abstract><cop>West Conshohocken, PA</cop><pub>American Society for Testing and Materials</pub><doi>10.1520/JTE11051J</doi><tpages>15</tpages></addata></record> |
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subjects | Applied sciences Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Elasticity. Plasticity Exact sciences and technology Materials science Mechanical and acoustical properties of condensed matter Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals, semimetals and alloys Metals. Metallurgy Physics Specific materials |
title | Diametral Strain Response and Microstructural Yielding Mechanisms of a Bainitic Pressure Vessel Steel |
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